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Billy Vunipola and James Johnston are to join Saracens at the end of the season

Saracens have agreed deals to sign of Billy Vunipola and James Johnston at the end of the season.

Last Updated: 14/01/13 5:37pm

In joining Sarries, Vunipola, 20, will link up with brother Mako, a prop forward who is already on the books of the Londoners.

The highly-rated number eight is set to train with England in the coming weeks and his decision to leave has not gone down well with current employers Wasps.

A statement on the Wasps website read: "The club has been informed this afternoon that Billy Vunipola has decided to leave at the end of the season.

"We are incredibly disappointed that he has chosen to leave and we will make a full comment on his departure tomorrow (Tuesday)."

Ten extend contracts

Samoan international Johnston, 26, will follow in the footsteps of his brother Census who had a three-year stint at Saracens himself between 2006 and 2009.

In addition to the captures of Vunipola and Johnston, Saracens have also agreed contract extensions with no fewer than 10 members of their squad.

Richard Wigglesworth, Mako Vunipola, David Strettle, Eoin Sherriff, Will Fraser, Ben Spencer, Nils Mordt, Duncan Taylor, Ben Ransom and James Short have all extended their stays with the Aviva Premiership outfit.

A statement of the club's website read: "Saracens is pleased to announce a dozen players have committed their future to the club. The following players have seen something special happening in north London and agreed new contracts."